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一种新的NADH-细胞色素b5还原酶基因点突变
引用本文:王瑶,吴玉水,杨文西.一种新的NADH-细胞色素b5还原酶基因点突变[J].中华血液学杂志,1999,20(10):521-523.
作者姓名:王瑶  吴玉水  杨文西
作者单位:南京军区福州总医院全军医学检验中心(王瑶!350025,吴玉水!350025,郑培蒸!350025,兰风华!350025,朱忠勇!350025),浙江省舟山市第一人民医院(杨文西,方国安),南京军区福州总医院全军医学检验(唐玉钗!350025)
基金项目:全军“八五”重点攻关课题
摘    要:目的 为了查明中国人遗传性高铁血红蛋白血症(RCM) 患者的NADH细胞色素b5 还原酶(b5R) 基因突变类型,探讨RCM 发生的分子机制。方法 从已报道的1 例RCMⅠ型患者的外周血白细胞中提取RNA,应用逆转录聚合酶链反应法(RTPCR) 扩增了b5RcDNA(921 bp),测定其b5RcDNA的全部编码序列。结果 b5RcDNA基因的第203 位密码子存在(TGC→TAC)Cys→Tyr 的错义突变。经基因组PCR限制性片段长度多态性(RFLP) 分析证实该突变并非PCR过程中的错配。结论 Cys203 →Tyr 是RCM 的一种新的基因突变类型

关 键 词:高铁血红蛋白血症  细胞色素还原酶  基因  点突变

A novel point mutation in NADH cytochrome b5 reductase gene
WANG Yao ,WU Yushui,YANG Wenxi,et al..A novel point mutation in NADH cytochrome b5 reductase gene[J].Chinese Journal of Hematology,1999,20(10):521-523.
Authors:WANG Yao  WU Yushui  YANG Wenxi  
Institution:Center for Medical Laboratory, Fuzhou General Hospital, Fuzhou 350025.
Abstract:OBJECTIVE: To characterize the b5R gene mutation in a Chinese patient with recessive congenital methemoglobinemia type I (RCM I). METHODS: Total RNA was extracted from the peripheral leukocytes of the patient and cDNA was synthesized by RT-PCR. The coding region of b5R cDNA (921 bp) was analysed by sequencing of the RT-PCR products. RESULTS AND CONCLUSION: A novel mutation of Cys203(TGC)-->Try(TAC) in exon 7 was identified, which was further confirmed by restriction enzyme analysis of the genomic DNA fragment.
Keywords:Methemoglobinemia    Cytochrome reductase    Gene    Point mutation
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